| Payment Terms︰ | TT |
| Packing︰ | 25KG/Bag |
| Product Data︰ | Luwax EVA 3 is very versatile. It can be considered as being essentially a
polyethylene wax with a molar mass typical for this group of substances,
but because it contains vinyl acetate, it is more polar, more elastic and
more finely crystalline than ethylene homopolymers. Luwax EVA 3 cannot
be considered as being a true EVA polymer, as these are resins rather than
waxes: they have a much higher molar mass and a higher vinyl acetate
content.
By using the relatively polar Luwax EVA 3 instead of the non-polar homo-
polymer PE waxes, it is possible to produce masterbatches with very polar
pigments like carbon black. The good wetting and excellent dispersing
effect of Luwax EVA 3, which has a relatively low melt viscosity, leads to
homogenous dispersion of the pigments with high colour strength.
Luwax EVA 3 is especially effective in dispersing carbon black. It has a
very high affinity for this type of pigment and its high wetting power
enables very highly concentrated dispersions to be produced. Master-
batches for PE, PP, PVC, polystyrene, nylon, polycarbonate, polyurethane
and many other plastics can be prepared. The following example is a
formulation of a pigment masterbatch for polyethylene and polypropylene:
15 % Luwax EVA 3
30 % Carbon black (e. g. Degussa Printex 60)
30 % LDPE moulding compound in powder form (e. g. Lupolen® 1800 SP 15)
25 % LDPE moulding compound in granular form (e. g. Lupolen 1800)
The first step is to mix the carbon black and powder-grade LDPE, and
then to add the granular components. The masterbatch is then extruded
as usual.
Other highly polar pigments are easy to disperse with Luwax EVA 3.
Luwax EVA 3 is compatible with most thermoplastics. Universal master-
batches consisting of pigments and waxes can be used to colour different
plastics.
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